Following the DirectX 9.0C November patch, Microsoft has also released a new update for Windows Vista that improves the compatibility, reliability, and stability of the OS. Download links for Vista 32-bit and Vista 64-bit.

This update includes the following improvements:

It extends the battery life for mobile devices.

It improves the stability of portable computers and of desktop computers that use an uninterruptable power supply (UPS).

It improves the reliability of Windows Vista when you open the menu of a startup application.

It improves the stability of wireless network services.

It shortens the startup time of Windows Vista by using a better timing structure.

It shortens the recovery time after Windows Vista experiences a period of inactivity.

It shortens the recovery time when you try to exit the Photos screen saver.

It improves the stability of Windows PowerShell.

This update also resolves the following issues in Windows Vista:

A compatibility issue that affects some third-party antivirus software applications.